FIGURE 5 SEQUENTIAL SEPARATION OF Np AND Pu FROM Am AND Cm FOR SOIL AND BONE SAMPLES Np, Pu, Am, Cm + Tracers Dissolved Sample La, HNO3, Ha02, &; make 8N HNQ3, NaNO» Record Am-Np Sep Time 8S¢ Anion Dowex !-X4, 1OQ0-200 mesh, 2.5X6cm BN KNO3 | Jan HNOQ3-0.iN HF | Am, Cm, La | | Np, Pu | iOOmg Ca; HsC20q, pH 3.5 —=— EVO. ; Hz803, HNO No, Pu Ca Oxalate, La, Am, Cm to separation aed purification ——Fe Pp— wet ash, HNOg NHgOH, pH&, dissolve in HNOs, Fe, La, Am, Cm $0 group purification ELUTION OF 24m AND *“Cm FROM A1.0CM DIAM., 7.5 CM LONG COLUMN OF DOWEX 50 AS A FUNCTION OF ELUANT VOLUME FIGURE 6 24am: Av. 4runs, 91.6+ 1.4%cecovered (95-45ml) 244em: Av 2runs, 95.0+2.2% recovered (95-45mi) fo ——————— WASH ELUANT soml 20% EtOH 3N HCI 1tOml 45% EtOH 6N HCI PERCENT OF TOTAL ACTIVITY 65S 20r— oh Lt Wasn-90 | 100 | ft 110 Eluant-O ft | ft ft 5 10 20 VOLUME OF ELUANT, ml tf | 30 | | yt ao 50